锆脱氧钢中非金属夹杂物及对显微组织的影响
发布时间：2018-07-26 06:34
【摘要】：实验用钢在低碳锰钢基础上采用锆脱氧及钛微合金化,研究了连续冷却和等温热处理条件下的组织转变行为,分析了夹杂物的析出类型及对组织转变的影响机理.统计结果表明:夹杂物在0.2~1μm尺寸范围内有较高的数量密度,主要为Zr O2·Mn S和Zr O2·Mn S·Ti N复相夹杂,与热力学分析结果一致.实验钢以1℃/s连续冷却及500℃等温时均得到晶内针状铁素体组织,促进铁素体形核的主要夹杂物类型为Zr O2·Mn S·Ti N.Mn S以Zr O2为核心复合析出形成贫锰区是促进铁素体形核的重要因素,Ti N的复合析出降低了铁素体形核界面能,进一步促进了针状铁素体转变.
[Abstract]:On the basis of low carbon manganese steel, zirconium deoxidation and titanium microalloying were used to study the microstructure transformation behavior under continuous cooling and isothermal heat treatment. The results show that the number density of inclusions is higher in the range of 0.2 渭 m, mainly composed of ZrO 2 mn S and ZrO 2 Mn S Ti N multiphase inclusions, which is consistent with the thermodynamic analysis. The acicular ferrite microstructure was obtained by continuous cooling at 1 鈩，
本文编号：2145168
[Abstract]:On the basis of low carbon manganese steel, zirconium deoxidation and titanium microalloying were used to study the microstructure transformation behavior under continuous cooling and isothermal heat treatment. The results show that the number density of inclusions is higher in the range of 0.2 渭 m, mainly composed of ZrO 2 mn S and ZrO 2 Mn S Ti N multiphase inclusions, which is consistent with the thermodynamic analysis. The acicular ferrite microstructure was obtained by continuous cooling at 1 鈩，
本文编号：2145168
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